antentopSince2 July

Ham Spirit
Free Choice

 

 

Free Antentop Amateur Open Book
Antentop Album
Antentop Survey

 

 

 

Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an

Special page devoted to

80/40 meter CW Transmitter

Custom Search

 

ANTENTOP- 01- 2005, # 007  

80/40 meter CW Transmitter

 

AM? Well, I have not tried. You gotta reduce input power a lot. 2-3W carrier output would be appropiate. Feed plate and screen through a modulation iron of around 7-8 kohms secondary impedance. Avoid AM on 80M during dark hours in EU, there ain't room enuff.

A little warning: Lethal voltages are present in this circuit. Be careful. Do not omit the output-to-ground choke. The -100V present at the key is not dangerous if the resistor values in the schematics are used and are of adequate quality and voltage rating.

The circuit could use a 6GW8/ECL86 but the high mu triode section is a tad hard to tame. It requires less bias voltage. I'll try another glowbug with this tube but with a Colpitts oscillator instead. Stay tuned, I will make a 6GW8/ECL86 bug also, perhaps after I have finished the Eurobug (EL83+EL34).

This glowbug has been on air for some time now and the reports are good, no chirp and no clicks. "Very good sound" is the normal report.

http://www.antentop.org/

Page 80

 

79 80

 

 

QRP Transceivers and PA from Accessible Parts IP for QRP Antentop Book Radio Antenna Engineering Book Antentop Printed and e- magazines
 


 

 

Just for Fun:

Map IP Address
Powered byIP2Location.com

Thanks for your time!

Last Updated:

August 3, 2016 16:52

Antentop Home Page

Free Antentop Open Book